diff --git a/arch/mips/dts/serval_pcb105.dts b/arch/mips/dts/serval_pcb105.dts
index 1598669..6672770 100644
--- a/arch/mips/dts/serval_pcb105.dts
+++ b/arch/mips/dts/serval_pcb105.dts
@@ -5,6 +5,7 @@
 
 /dts-v1/;
 #include "mscc,serval.dtsi"
+#include <dt-bindings/mscc/serval_data.h>
 
 / {
 	model = "Serval PCB105 Reference Board";
@@ -54,3 +55,46 @@
 	status = "okay";
 	sgpio-ports = <0x00FFFFFF>;
 };
+
+&mdio1 {
+	status = "okay";
+
+	phy16: ethernet-phy@16 {
+		reg = <16>;
+	};
+	phy17: ethernet-phy@17 {
+		reg = <17>;
+	};
+	phy18: ethernet-phy@18 {
+		reg = <18>;
+	};
+	phy19: ethernet-phy@19 {
+		reg = <19>;
+	};
+};
+
+&switch {
+	ethernet-ports {
+
+		port0: port@0 {
+			reg = <7>;
+			phy-handle = <&phy16>;
+			phys = <&serdes_hsio 7 SERDES1G(7) PHY_MODE_SGMII>;
+		};
+		port1: port@1 {
+			reg = <6>;
+			phy-handle = <&phy17>;
+			phys = <&serdes_hsio 6 SERDES1G(6) PHY_MODE_SGMII>;
+		};
+		port2: port@2 {
+			reg = <5>;
+			phy-handle = <&phy18>;
+			phys = <&serdes_hsio 5 SERDES1G(5) PHY_MODE_SGMII>;
+		};
+		port3: port@3 {
+			reg = <4>;
+			phy-handle = <&phy19>;
+			phys = <&serdes_hsio 4 SERDES1G(4) PHY_MODE_SGMII>;
+		};
+	};
+};